Keyboard



FIG. 1 is a top, front and right side perspective view of a keyboard showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view;

FIG. 4 is a bottom plan view;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a right side elevational view, the left side elevational view being substantially a mirror image. 

The ornamental design for a keyboard, as shown and described. 